This might be an easy answer and i've just missed but it just occured to me that since IM1 i can't recall what Stark Industries does.

Back in Iron Man they were a weapons nanufacturer, but they ceased making weapons after Tonys experience in the movie.

In Iron Man 2 Tony made Pepper the CEO of the company, and Hammer industries took up the weapons contract ith the US governent, but it from what i recall it never mentioned what Stark Industries do now instead of making weapons.

In The Avengers Tony builds Stark Tower and sets up a power grid, thats all we see. In Iron Man 3, Killian visits Pepper about partnering up for Extremis and is turned down. I don't remember much else of Stark Enterprises in the movie.

So since "That's a weapons company that doesn't make weapons" what do they do now?

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Originally Posted by SuperT

Fans: We're over the black leather suits. Give us more comic accurate!-production gives us comic-book accurate costumes-Fans: They look too much like the comics/cartoon. UGH! WTF!

No wonder studios don't listen to us, we don't know what the hell we want.